<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>权限管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片视图 -->
		<el-card>
			<!-- 添加角色按钮区 -->
			<el-row>
				<el-col>
					<el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
				</el-col>
			</el-row>
			<!-- 角色列表区 -->
			<el-table :data="roleList" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']"
							v-for="(item1, i1) in scope.row.children" :key="item1.id">
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}
								</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 渲染二级和三级权限 -->
							<el-col :span="19">
								<el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']"
									v-for="(item2, i2) in item1.children" :key="item2.id">
									<!-- 二级权限 -->
									<el-col :span="6">
										<el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">
											{{item2.authName}}</el-tag>
										<i class="el-icon-caret-right"></i>
									</el-col>
									<!-- 三级权限 -->
									<el-col :span="18">
										<el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id"
											closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}
										</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
						<!-- 修改按钮 -->
						<el-button size="small" type="primary" icon="el-icon-edit"
							@click="showEditDialog(scope.row.id)"></el-button>
						<!-- 删除按钮 -->
						<el-button size="small" type="danger" icon="el-icon-delete"
							@click="removeRoleById(scope.row.id)"></el-button>
						<!-- 分配权限按钮 -->
						<el-tooltip effect="dark" content="分配权限" placement="top" :enterable="false">
							<el-button size="small" type="warning" icon="el-icon-setting"
								@click="showSetRightDialog(scope.row)"></el-button>
						</el-tooltip>
					</template>
				</el-table-column>
			</el-table>
		</el-card>
		<!-- 修改用户的对话框 -->
		<el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
			<el-form ref="editFormRef" :model="editForm" label-width="70px" class="demo-ruleForm">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="editForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="editForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer" class="dialog-footer">
				<el-button @click="editDialogVisible = false">取消</el-button>
				<el-button type="primary" @click="editRoleInfo">确定</el-button>
			</span>
		</el-dialog>
		<!-- 添加用户的对话框 -->
		<el-dialog :visible.sync="addDialogVisible" title="添加角色" width="50%" @close="addDialogClosed">
			<!-- 内容主题区 -->
			<el-form ref="addFormRef" :model="addForm" label-width="70px">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="addForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="addForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<!-- 对话框底部按钮区 -->
			<span slot="footer" class="dialog-footer">
				<el-button @click="addDialogVisible = false">取消</el-button>
				<el-button type="primary" @click="addRole">添加</el-button>
			</span>
		</el-dialog>
		<!-- 分配权限的对话框 -->
		<el-dialog title="分配权限" :visible.sync="setSetRightDialogVisible" width="50%" @close="setSetRightDialogClosed">
			<!-- 树形控件 -->
			<el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all
				:default-checked-keys="defKeys" ref="treeRef"></el-tree>
			<span slot="footer" class="dialog-footer">
				<el-button @click="setSetRightDialogVisible = false">取消</el-button>
				<el-button type="primary" @click="allotRights">确定</el-button>
			</span>
		</el-dialog>
	</div>
</template>

<script>
	export default {
		data() {
			return {
				// 所有角色列表数据
				roleList: [],
				// 控制修改用户对话框的显示与隐藏
				editDialogVisible: false,
				// 查寻到的用户信息对象
				editForm: {},
				// 控制添加用户对话框的显示和隐藏
				addDialogVisible: false,
				// 添加用户的表单数据
				addForm: {
					roleName: '',
					roleDesc: ''
				},
				// 控制分配权限对话框的显示和隐藏
				setSetRightDialogVisible: false,
				// 所有权限的数据
				rightsList: [],
				// 树形控件的属性绑定对象
				treeProps: {
					label: 'authName',
					children: 'children'
				},
				// 默认选中的节点id值
				defKeys: [],
				// 当前即将分配权限的角色id
				roleId: ''
			}
		},
		created() {
			this.getRolesList()
		},
		methods: {
			// 获取所有角色列表数据
			async getRolesList() {
				const {
					data: res
				} = await this.$http.get('roles')
				if (res.meta.status !== 200) {
					return this.$message.error('获取角色列表失败！')
				}
				this.roleList = res.data
			},
			// 点击按钮，展示编辑角色的对话框
			async showEditDialog(id) {
				const {
					data: res
				} = await this.$http.get('roles/' + id)
				if (res.meta.status !== 200) {
					return this.$message.error('查询用户信息失败！')
				}
				this.editForm = res.data
				this.editDialogVisible = true
			},
			// 监听修改用户对话框的关闭事件
			editDialogClosed() {
				this.$refs.editFormRef.resetFields()
			},
			// 修改角色信息并提交
			editRoleInfo() {
				this.$refs.editFormRef.validate(async valid => {
					if (!valid) return
					// 发起修改角色信息的数据请求
					const {
						data: res
					} = await this.$http.put('roles/' + this.editForm.roleId, {
						roleName: this.editForm.roleName,
						roleDesc: this.editForm.roleDesc
					})
					if (res.meta.status !== 200) {
						return this.$message.error('更新角色信息失败！')
					}
					// 关闭对话框
					this.editDialogVisible = false
					// 刷新数据列表
					this.getRolesList()
					// 提示修改成功
					this.$message.success('更新角色信息成功！')
				})
			},
			// 根据id删除对应的角色信息
			async removeRoleById(id) {
				// 询问用户是否删除
				const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning',
				}).catch(error => error)
				// 确认删除返回字符串“confirm”
				// 取消删除返回字符串“cancel”
				if (confirmResult !== 'confirm') {
					return this.$message.info('已经取消删除')
				}
				const {
					data: res
				} = await this.$http.delete('roles/' + id)
				if (res.meta.status !== 200) {
					return this.$message.error('删除用户失败！')
				}
				this.$message.success('删除用户成功！')
				this.getRolesList()
			},
			// 监听添加用户对话框的关闭事件
			addDialogClosed() {
				this.$refs.addFormRef.resetFields()
			},
			// 点击按钮，添加新用户
			addRole() {
				// 点击确定按钮，表单预校验
				this.$refs.addFormRef.validate(async valid => {
					if (!valid) return
					// 校验通过，可以发起添加用户的网络请求
					const {
						data: res
					} = await this.$http.post('roles', this.addForm)

					if (res.meta.status !== 201) {
						this.$message.error('添加用户失败！')
					}
					this.$message.success('添加用户成功！')
					// 隐藏添加用户对话框
					this.addDialogVisible = false
					// 重新获取用户列表数据
					this.getRolesList()
				})
			},
			// 根据Id删除对应的权限
			async removeRightById(role, rightId) {
				const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning',
				}).catch(err => err)

				if (confirmResult !== 'confirm') {
					return this.$message.info('取消了删除！')
				}
				const {
					data: res
				} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
				if (res.meta.status !== 200) {
					return this.$message.error('删除权限失败！')
				}
				this.$message.success('移除权限成功！')
				role.children = res.data
			},
			// 展示分配权限的对话框
			async showSetRightDialog(role) {
				this.roleId = role.id
				// 获取所有权限的数据
				const {
					data: res
				} = await this.$http.get('rights/tree')
				if (res.meta.status !== 200) {
					return this.$message.error('获取权限失败！')
				}
				// 获取到的权限数据保存到data中
				this.rightsList = res.data

				// 递归获取三级节点的id
				this.getLeafKeys(role, this.defKeys)

				this.setSetRightDialogVisible = true
			},
			// 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys中
			getLeafKeys(node, arr) {
				if (!node.children) {
					return arr.push(node.id)
				}
				node.children.forEach(item => this.getLeafKeys(item, arr))
			},
			// 监听分配权限对话框的关闭事件
			setSetRightDialogClosed() {
				this.defKeys = []
			},
			// 点击为角色分配权限
			async allotRights() {
				const keys = [
					...this.$refs.treeRef.getCheckedKeys(),
					...this.$refs.treeRef.getHalfCheckedKeys()
				]
				const idStr = keys.join(',')

				const {
					data: res
				} = await this.$http.post(`roles/${this.roleId}/rights`, {
					rids: idStr
				})
				if(res.meta.status !== 200){
					return this.$message.error('分配权限失败！')
				}
				this.$message.success('分配权限成功')
				
				this.getRolesList()
				this.setSetRightDialogVisible = false
			}
		}
	}
</script>

<style lang="less" scoped>
	.el-tag {
		margin: 7px;
	}

	.bdtop {
		border-top: 1px solid #eee;
	}

	.bdbottom {
		border-bottom: 1px solid #eee;
	}

	.vcenter {
		display: flex;
		align-items: center;
	}
</style>
